Emergency and parking brake



Aug. 24, 1943.

C. N. REAVI EMERGENCY AND PARKI Filed Aug. 18,

NG BRAKE 1941 5 sheets-sheet 1 may, 4

Kg Inventor d;

KMkwilifiavzls' A/ 'Aug. 24, 1943. c. N. REAVIS EMERGENCY AND PARKING BRAKE Filed Aug. 18, 1941 5 Sheets-Sheet 2 Inventor faa Zas'fllmyauals Aug. 24, 1943. c REAVls EMERGENCY AND PARKING BRAKE 3 She ets-Sheet 3 Filed Aug. 18, 1941 Y pipe 26.

registered by the valve element port 3| to exhaust to the atmosphere the vacuum subsisting in the It will be evident that while the port 32 is registered with the pipe 25 the port 3| will be registered with the openport 34, and that while the ports 3] and 3 2 are registered with'the pipes 25 and 33. the open port3 i will be closed, and

an open path for the vacuum will exist between the'pipe '26 and-the pipe 33, which is the normal 7 I v I y position of the valve. w The valve 2'! is operatedeither by the emergency hand brake cable 35 which is Wound around the periphery of the pulley wheelS!) and possessed of aspiring anchor 36 to-the dashbo'ard of the driver compartmentot the automobile, or

. by the connecting rod 37 which has; aneccentric;

connection 38 with the outer side of the pulley wheel 30 in a manner to be described. 1 The emer gency brake cabl 34 is conventionally connected. to a-conventional emergency brake handle 39 mounted in thedriving' compartment or the'auto mobiles J The lower end'of :the connecting rod is opera breaker 45 which is mounted-011a suitable portionflof the automobile; the circuit-b-reakef 4a being placed inthe" element 42 of the ignition circu'it in"which also is connected'the usual ignition switch-43, so that with the'ignition'sw-itch in theon position the circuit breakerAfl' can operate to break the existing electricalcircuit or tain amount of lost motion which is cushioned'bifthe spring58, in the operation of the pin 55.

As shown in Figure 9. of the drawings the car 1 Y battery 637has one side thereof grounded to theg chassis as indicated at 64 and has its opposite. side connected to the ignition switch 43 from which extends the mentioned circuit component 42 in which is located the circuit breaker between the ignition switch and .thesolenoidtfl,

the latter having on side; groundedi aft 69; as .f already described. Also connected to the-ignia" .tion switch is the'line 65 leadingto'the primary 1 of the ignition circuit (not shown). Y

" The supplementary vacuum pipe 33 hasa'check valve, 56 therein and this is connected to the 7 I fvacuumisupply 61 which may be of any suitable atiyelyconnected to the switch arm of; a circuit Y "can operate to restore the same depending upon- .the operation of the pulley wheel 50 by' the manipulation of the emergency brake handlever 39. Thepo'rtion'dZ-of the ignitionbattery'cir 3 cuit of:theflauto nobile leads to -the terminal- 44 1 of the control'bo'x which is g'enerally designated 45 and which -is mounted at a suitable"portion type or bethe' suction manifold of the automobile w engine; a j

Assuming that, the automobile engine is in 7 operation and thehand brake is in; the released I or off'condition, andrthe driver wishes to park a the automobile, the automobileuiskbraked by the," V use of the ordinary service brake system. to :a":

standstill and the ignition key or the; lgnitioni switchiiifi is-turned to the off-position. ';This.,dee

energizes the solenoid 4, 1,1thereby' allowingfthcl left hand end of the arm 52- to drop andnncoveril the open lower end of the small bleederitube' 51.; 1 'Thisslow'ly: bleeds the vacuum cylinder-.13."? i 1 same movement -of-.-the 'arm: 52 .withdraws tliel a locking.pini59 upwardly; thereby allowing the I brake applying bar 15 to'fmoveforwardlydue-to; K 1

the tension of.the;springff24 andapply the emer- Y 'gency *1 brake." In the: "arrangement. sh'dwnl the such as the portion 2a of the chassis. 'The'termi;

nal fl is connected as indicated by the numeral 46 with one end ofthe winding-of ayertical sole .noid 41 which is mounted in the'fcas'e48 and-has the opposite endj-ofitswindinggrounde'd iii the case as indicated by thenurneml 49; 'The solenoid has a vertically operating core 59 'which is' pivotedas indicatedby the numeral 5I{to"'a point near.' one end of the combinedvalve arm "and switch arm which is generally designated 7 52 and, which is 'pivotally mounted as indicated by' the numeral 53 on"abracket 54 in thecase 48w A eon:

tractile" spring 55 is stretched between an upper;

part, of the case 48' and the right "hand endf of ofthelarrn52i Thearm'52 is'show'n' 6 of the, drawings-as in "operated pps'itio'n irfwhich V 7 its "valve-element is in closing"relationtethe lower o-penend ofjthe small vacuum bl'eeder pipe the arm '52 to 'no-rmallyjdepress the =le'ithand 'erid 51- asl-illustrated detail in'Figurej iijof the'dra-Wi mes;- f-Mounted l-orr-the jeeiitr i' portion 1 of e arm 5? and exte ding towardjthe right-hand end t e o 119; u d y W l Q?k p ii S r whichfbearsidownj uponjthe {I l P6!- lend of the locking pm 59 which is: ounted gr p; vertical idi al ema hr e' "lepe in i e d" the block Eliin the case 4 8, andthe 'brac ket 211 so as to occupy in its depressedconditionsa posin, i om i {the l h nd. en of t e b k operatingbarglS so as to positively prevent further. forward movement ofthis'end of the bar. 15;] In the raised position of the pin 59 it-isrireed iromthe bar l5 allowing'ethe bar 15' to move forwardly.

The right hand endof thefarm 52works more or less freely .from a slot 625 formed adjacentlthel upper end of the'pin 59; thereby allowing a'cer gency' brake lever til is" pulled -rearwardly swing-the left nane endof the bar 1 ispperating at hig'h" speed, the-1e ergen "cable-35w operate the pulleywheel "3p n ten-clockwise direction; sqzajsfto open th breaker 4Q, deenergize thesolenoid nee full operatidn'sdoes notzgo into" efiec'tuntil about:

six seconds after theignition' witch has gflr'st been'turned oifgg' I Toagain'drive the'car andrelease1 he brake the ignition key is turned on so-as to p'ass cur rent fromthe ignition 'switchthroughthewire 1. g i to the solenoid. j 'lhiseriergizesthe' solenoid:

i and brings up'the'left hand end oithei armfl;

resulting in closing of the open end of thibleed-z v Q erfpipe' 51-by the-valve '55. Downwar'dihfovement' or the locking E pints-is; obstructed in i thigi arrahgement-o fparts by the 'pi'e's'en'cefofgthe tar-1.

I 5 urider t but the sloft 6251:! theme: 9 is. long enough jtopermit'the right hand -end omhe arin i;

.52 to subside relative to the pin 591t0" perm' itthe valve 5Bito seat -against the lo'wer end oi {the if:- bleedeij "pipe 51 and close it)" despite the elevated I position ef' the pin 59.= When' sufficient'vacuu n; V

is developed in the'cylinder ngthe bra ating bar I5 moves in a rearward direction ficientdi's'tance m allow' 'the piri '5 9etofdfiop mt 3 the depressedf'locking'l osition shownj 'in lilguife 6 ofthe drawings, so that-"should accidental= dam=' age occur to theveeuum tubingf or "rnptur thedia'phragm 'o'f the cylinder Z3 whilet U will not become applied wan s drivers'oas'to cause an accident:- r "Tooper'ate the emergencybrake in case ofa emergency for. to hold-th yemeie ee a '.h ill m th-engine of the automobile run'nin'gftlie m wardly'in ithefordinaryway "This"c au ses -t" 7 the 'loclring pinf5flftq be iwi-thdrawnltt ative position, thereby allowing the 'sprin 2! t In the position of :the' threeway valve achieved by the operation-of the brake meme-seine mainiii-8275559 'vacuump ie is connectediin cojm uni na with open por-tflfso'that t 'e vacuum cylinder Reisinstantlyb -and tl i suction Torelease-the gbrakes;applied n themann'eil described-immediately ceased; downwardly {0 wa This'fresults "in; otating the pulley Wheel in a clockwise direction are to the} cont'ra'ct ing action of-the spring 3fiH I'his rQtati n of "the ferwai'd-lyflinthe usual --pulley wheelgdperates the three-wayf-valve 2+ so.

that communication is established '"betweenthe vacu m source and the vacuum cyl'inder. This operates tocause the vacuumcylinder; overcome' the tensio' o'f 'thef brake applying} spring the bial're'srand thelsam'e I I valv d-permit'th hand end ofu the brake apply 1 iforwaird movement, restricted by the depi essed pennant: the locking;pin '58 lagainst whichathe V bar lfi is' held by tn'eepuii ortriespri g zai a n 7 ignition switchis then turriewoil and he brake ftion until suh tlmb 'asthe remains'in the off no engineis started agairn Although I have shownand described the preferred embodiment of my inventiornit is to be arra ged-to function tohold the'said brakesun,- applied while theengirie. is ru'nning; and abrak'e r v n sr m m nt re to p y dld h brakes applied whi-le said vacuum cylinde'r is inoperative due-to' inoperative condition ofsaid 'en' gine, said ;ignitionswitch being arranged to d'eenergize the ignition circuit in its ofi position' to renderpthe engine inoperative-and permit appli-r cation '-o f tl-ie brakes by said spring, a manually operated-three-way valve connected in -communication' between said intake: manifold and said vacuwn' cylinder, said three wayvalve" havinga first port connected J to saidjintake manifold, a

second 1 port connected *to said vaeuum cylinden anda third=port opening-to the atmosphere said "three-way valve 'havin fe, hollow rotary valve core -havi-ng a {pair of circnniierentiallyspaced 1 ports adapted to? be selectively registered with two of-said first,-"second; and-third pd ts te establli'sl-i cbmmunicatibn betw'een said 'i l'ianifold and theilac'uum cylinder-i0 operate the same, onto closeo'fi said; manlfoldfroin saidl vacuum cylinder andvestablish"communication between said 3:"Applyin'g" ans rer the emergency and par-Icing brakes of-*an automobile, said-automodefinitely understood thatI do not wish to limit- .7 the application of the invention thereto except as i may be required by the scope of the 'subjoined;

claims.

Having thus described my invention;

claimed as new is:

1. Applying means for the emergency and parking brakes of an automobile, said automobile havingan engine'including an intakemanifold, and a battery and ignition circuit involving anignition switch, said applying means comprising a vacuum cylinder in communication with said intake manifold and having operative connection'with the said brakes, said vacuum cylinder being arranged to function to hold thesaid brakes unapplied while the engine is: running, and a brake applying spring connected to'apply and hold thei'brakes'applied while said engine is in an inoperative condition and there is insufficient suction in the intake manifold said circuit including an e]ectrornagnetically'operatedv bleeder valve for said' vacuum cylindengsaid bleeder valve being arranged to be closed while said circuit is energized and to be open whenever bile ha ving anengine including an intakfmani fold}; and a-battery and ignition circuitinvolving an" ignition switch, 'saidapplyin'g hiean's compris ing-a vacuum manifnldhan' -having-connection withthe said brakes said- 'vacuurn ylinderbeing arranged 'to hold the 'aid brakes; unappliedfwhile t eng ne is-runnin an a brake applyiiigspring connect; H hold thfbrakesapplied while said vacuum cy miieri 'is inoperative due to in operative condition ofsaidengine, said ignition switch being arranged to deenergize the ignition circuit in its off position to rende'r'the engine inoperative (and permit application of the brakes.

amanually operated three-way valve connected in communication-between said intake manifold and said vacuum cylinder, said three-way valve having a first part connected to said intake manifold, a secondpart connected to said vacuum cylinder, and a third part opening to the atmosphere, said three-way valve having a hollow ro- Y tary valve core having a pair of circumferentially spaced parts adapted to be selectively registered with two of said first, second, andthird parts to establish communication between said manifold and the vacuum cylinder to'operate the same, or to close oil said manifold and establish com! munication between said vacuum cylinder and the atmosphere for quick-bleeding of said vac-' "uum cylinder, anormally closed circuit breaker H connected in said circuit in advance of said igsaid circuit is deenergizedthe aperture of said a bleeder valve'being proportioned to bleed said vacuum cylinder to the atmosphere when said bleeder valve is open at a rate commensurate with the desired rate of applicationof the brakes following stopping, of the engine. V

2. Applying means for the emergency and parking brakes of an automobile, said automobile having an engine including an intakefmanifold,

and a battery and ignition circuit-involving, an ignition s'witch,said applying means comprising a vacuum cylinder in communication with said 7 having an engine including an intake manifold,

intake manifold and having operative connection a with the said brakes, said vacuum cylinderbeing nition switch, said circuit breakerhaving operative connection with said three-way valve whereby said circuit breaker is opened to deenergize said circuitsubstantially when said threeway valve is manually operated quick-bleed said cylinder. V

' 4. Applying means for the emergency and parking brakes ofxan automobile, said automobile and a battery andignition circuit involving an ignition switch, said applying means comprising a. vacuum cylinder in communication with said intakemanifold and having operative connection with the said brakes, said vacuum-cylinder being arranged to function to retract the said brakes from applied position while the engine is running and produces sufiicient suction in said manifold,

vacuum-f cylinder and the atmospherel for quickinder connected to said'yintake into position to' and a brake'applying spring connectedz .to apply andhold the brakes, applied while said engine is in; an inoperative condition and thereis insufficient suction in the manifold, said ignition switch beingarranged to deenergize the ignition circuit inits off position to render the engine inoperativeandpermit application of the brakesby said spring a manuallyfoperated three-way valve' connected in communication between said intake manifold and said vacuum cylinder, said threeway valvehaving a first port connected :to, said intake manifold,- a second port connected; to said vacuum cylinder, and a third port opening to ,the atmosphere, said, three-way valve: having a hollcw rotary valve core having a pair of circumferentially spaced ports adapted to'beselectively registered with two of said first, second, -and.

third :ports to establish communication: between said; manifold and'the vacuum cylinder to oper-f ate the latter, or--to'close off said'manifold from the, vaccum cylinder and establish, communicaI-- tion between :said vacuumcylinder and the a tmosphere for quick-bleeding jof said vacuum cylinder, anormally closed circuit breaker; connected in said circuit in advance: 0f;. said;ignition switch, said circuit breaker diav-ing operative connection .with said three-way valve whereby,

said circuit breaker is openedto deenergize said circuit substantiallymvhen said three-way valve is manua'lly operated into position to quick-bleed said cylinder, and an electromagnetically operated .slow-bleeder valve tcommunication -with the vacuum cylinder, said,slow-.- bleeder valve be ing closed while said :circuit :is energized and adapted to open 'to-slowlybleed-the vacuumcy1- inder following-a manual application of the brakes and .deenergizine-ofsaid "circuit;

- 5; Applying. means for the emergency. and' parking brakes of an automobile; said :autcmo bile having an engine includingan intake manb fold, and a battery and ignition circuitinvolving an ignition switch, saidapplyingmeans-comprising a vacuum rcylinder -in communication With said intake manifold and havin bperativle" connection with the ,said brakes said vacuum cylinder being arranged ,to giuncticn ito en-act Y the said brakes irom applied position -while'ther engineisrunning, and-a brake applyinglspring connected to apply andhold-thegbrakesappliedwhile said engine is-in an inoperative; condition.

and there is insufficient suctiongingthe manifold .to actuatethe vacuum cylinder, 'said circuit ,i iieluding; an electromagnetically= operated- '.s1cw-.

bleeder valve for said vacuum cylinder, said slow.-

tofmove to inoperative-position? upon opening :of

' saidslowebleedefva1ve,::said locking element .be-

plying meansv 3 5. a 1

ing arranged to engage a portion of said brakes" to positively prevent'application of thewbrakes" by said springrwhile theengine is ioperatin'giupdn failureiof any other active component of Y, the; ap

1 REAvrs. 

